package com.zhenquan.doubanread.service.impl;

import com.zhenquan.doubanread.common.Const;
import com.zhenquan.doubanread.common.ServerResponse;
import com.zhenquan.doubanread.common.TokenCache;
import com.zhenquan.doubanread.dao.UserMapper;
import com.zhenquan.doubanread.pojo.User;
import com.zhenquan.doubanread.service.IUserService;
import com.zhenquan.doubanread.util.MD5Util;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.UUID;

/**
 * Created by Administrator on 2018/1/13 0013.
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {
    @Autowired
    private UserMapper userMapper;

    @Override
    public ServerResponse<User> login(String username, String password) {
        int resultCount = userMapper.checkUsername(username);
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("用户名不存在");
        }

        User user = userMapper.selectLogin(username, MD5Util.MD5EncodeUtf8(password));
        if (user == null) {
            return ServerResponse.createByErrorMessage("密码错误");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess("登陆成功", user);
    }


    @Override
    public ServerResponse<String> register(User user) {
        ServerResponse checkValid = checkValid(user.getUsername(), Const.USERNAME);
        if (checkValid.isSuccess()) {
            ServerResponse checkValidemail = checkValid(user.getEmail(), Const.EMAIL);
            if (checkValidemail.isSuccess()) {
                user.setRole(Const.Role.ROLE_CUSTOMER);
                //MD5
                user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));
                int resultCount = userMapper.insert(user);
                if (resultCount == 0) {
                    return ServerResponse.createByErrorMessage("注册失败");
                } else {
                    return ServerResponse.createBySuccess("注册成功");
                }
            } else {
                return checkValidemail;
            }
        } else {
            return checkValid;
        }
    }

    /**
     * 检验用户名或者邮箱是否符合规范，符合则返回TRUE
     *
     * @param str
     * @param type
     * @return
     */
    @Override
    public ServerResponse<String> checkValid(String str, String type) {
        if (StringUtils.isNotBlank(type)) {
            //开始校验
            if (Const.USERNAME.equals(type)) {
                int resultCount = userMapper.checkUsername(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("用户名已存在");
                }
            }
            if (Const.EMAIL.equals(type)) {
                int resultCount = userMapper.checkEmail(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("邮箱已存在");
                }
            }

        } else {
            return ServerResponse.createByErrorMessage("参数错误");
        }
        return ServerResponse.createBySuccess("校验成功");
    }

    /**
     * 根据用户名找到问题
     *
     * @param username
     * @return
     */
    @Override
    public ServerResponse selectQuestion(String username) {
        ServerResponse validResponse = this.checkValid(username, Const.USERNAME);
        if (validResponse.isSuccess()) {
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String question = userMapper.selectQuestionByUsername(username);
        if (StringUtils.isNotBlank(question)) {
            return ServerResponse.createBySuccess(question);
        }
        return ServerResponse.createByErrorMessage("找回密码的问题为空");
    }

    /**
     * 检验问题的答案是否正确，并且设置token到缓存中
     *
     * @param username
     * @param question
     * @param answer
     * @return
     */
    @Override
    public ServerResponse<String> checkAnswer(String username, String question, String answer) {
        int resultCount = userMapper.checkAnswer(username, question, answer);
        if (resultCount > 0) {
            //说明问题及问题答案是这个用户的,并且是正确的
            String forgetToken = UUID.randomUUID().toString();
            TokenCache.setKey(TokenCache.TOKEN_PREFIX + username, forgetToken);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return ServerResponse.createByErrorMessage("问题的答案错误");
    }

    /**
     * 忘记重设密码
     *
     * @param username
     * @param passwordNew
     * @param forgetToken
     * @return
     */
    @Override
    public ServerResponse<String> forgetResetPassword(String username, String passwordNew, String forgetToken) {
        if (StringUtils.isBlank(forgetToken)) {
            return ServerResponse.createByErrorMessage("参数错误，token需要传递");
        }
        ServerResponse validResponse = this
                .checkValid(username, Const.USERNAME);
        if (validResponse.isSuccess()) {
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String token = TokenCache.getKey(TokenCache.TOKEN_PREFIX + username);
        if (StringUtils.isBlank(token)) {
            return ServerResponse.createByErrorMessage("token无效或者过期");
        }
        if (StringUtils.equals(forgetToken, token)) {
            String md5Password = MD5Util.MD5EncodeUtf8(passwordNew);
            int rowCount = userMapper.updatePasswordByUsername(username, md5Password);
            if (rowCount > 0) {
                return ServerResponse.createBySuccess("修改密码成功");
            }
        } else {
            return ServerResponse.createByErrorMessage("token错误，请重新获取重置密码的token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败");
    }

    @Override
    public ServerResponse<String> resetPassword(String passwordOld, String passwordNew, User user) {
        int resultCount = userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld), user.getId());
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("旧密码错误");
        }
        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount = userMapper.updateByPrimaryKeySelective(user);
        if (updateCount > 0) {
            return ServerResponse.createBySuccess("密码更新成功");
        }
        return ServerResponse.createByErrorMessage("密码更新失败");
    }

    @Override
    public ServerResponse<User> updateInformation(User user) {
        int resultCount = userMapper.checkEmailByUserId(user.getEmail(), user.getId());
        if (resultCount > 0) {
            return ServerResponse.createByErrorMessage("email已存在，请更换email再尝试更新");
        }
        User updateUser = new User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
        updateUser.setPhone(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());
        updateUser.setIntro(user.getIntro());
        updateUser.setBirthday(user.getBirthday());
        updateUser.setAvatar(user.getAvatar());
        int updateCount = userMapper.updateByPrimaryKeySelective(updateUser);
        if (updateCount > 0) {
            return ServerResponse.createBySuccess("更新个人信息成功", updateUser);
        }
        return ServerResponse.createByErrorMessage("更新个人信息失败");
    }

    @Override
    public ServerResponse<User> getInformation(Integer userId) {
        User user = userMapper.selectByPrimaryKey(userId);
        if (user == null) {
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess(user);
    }

    /**
     * 检验是否是管理员
     * @param user
     * @return
     */
    @Override
    public ServerResponse checkAdminRole(User user) {
        if (user != null && user.getRole().intValue() == Const.Role.ROLE_ADMIN) {
            return ServerResponse.createBySuccess();
        }
        return ServerResponse.createByError();
    }
}
